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Applied Physics Letters / Volume 96 / Issue 18 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 96, 182502 (2010); http://dx.doi.org/10.1063/1.3422476 (3 pages)

Microstructure and ferromagnetic property in CaRuO3 thin films with pseudoheterostructure

Y. B. Chen1, Jian Zhou2,3, Fei-xiang Wu2, Wei-jing Ji2, Shan-Tao Zhang2, Yan-Feng Chen2, and Yong-Yuan Zhu1

1Department of Physics, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
2Department of Materials Science and Engineering, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
3Department of Physics, Group of Computational Condensed Matter Physics, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China

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(Received 10 December 2009; accepted 11 April 2010; published online 4 May 2010)

CaRuO3 thin films were synthesized on SrTiO3 substrates by pulsed laser deposition. Detailed microstructure analysis by transmission electron microscopy revealed the pseudoheterostructure in CaRuO3 films. It consists of a coherently strained cubic CaRuO3 layer contacted with substrate, as well as a strained orthorhombic CaRuO3 layer. The orthorhombic CaRuO3 layer is composed of two types of domains. The ferromagnetic property of the pseudoheterostructure CaRuO3 was revealed by superconducting quantum interference device measurement. This is due to the cubic CaRuO3 layer, which is supported by first-principle calculations. The formation mechanism of pseudoheterostructure in ultrathin CaRuO3 thin films was proposed.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

calcium compounds, ferromagnetic materials, pulsed laser deposition, ruthenium compounds, thin films, transmission electron microscopy

PACS

  • 68.55.-a

    Thin film structure and morphology

  • 75.50.Cc

    Other ferromagnetic metals and alloys

  • 75.70.-i

    Magnetic properties of thin films, surfaces, and interfaces

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3422476

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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